XML的解析 DOM解析

参考上一篇的XML数据，上次我们使用的SAX解析。

http://blog.csdn.net/lee727n/article/details/73271916

这次我们通过DOM解析。



软件结构与上一篇一样，需要引入TBXML第三方类。用来做DOM解析

核心代码BookXMLParser.m中的逻辑

+(NSArray *)parseBookWithFileName:(NSString *)name{

NSMutableArray *books = [NSMutableArray array];

TBXML *tbXML = [[TBXML alloc]initWithXMLFile:name fileExtension:@"xml" error:nil];

TBXMLElement *booksEle = tbXML.rootXMLElement;

TBXMLElement *bookEle = [TBXML childElementNamed:@"book" parentElement:booksEle];

while (bookEle) {

Book *book = [Book new];
book.bookID = [TBXML valueOfAttributeNamed:@"bookID" forElement:bookEle];

TBXMLElement *titleEle = [TBXML childElementNamed:@"title" parentElement:bookEle];
TBXMLElement *pageEle = [TBXML childElementNamed:@"page" parentElement:bookEle];
TBXMLElement *authorEle = [TBXML childElementNamed:@"author" parentElement:bookEle];
TBXMLElement *priceEle = [TBXML childElementNamed:@"price" parentElement:bookEle];

book.price = [TBXML textForElement:priceEle];
book.title = [TBXML textForElement:titleEle];
book.page = [TBXML textForElement:pageEle];
book.author = [TBXML textForElement:authorEle];

[books addObject:book];

//查找下一个兄弟标签
bookEle = [TBXML nextSiblingNamed:@"book" searchFromElement:bookEle];
}
return books;
}

相对于上一种方式是不是显得更高效，代码更简洁。这就是DOM解析，将所有数据拿到内存中组成树形结构再解析。效率高。只是消耗内存